Hydrochloric Acid → Benzhydryl 7-[2-(5-amino-1,2,4-thiadiazol-3-yl)-2-ethoxyiminoacetamido]-3-chloromethyl-3-cephem-4-carboxylate

HRID 1247920Notes

Reaction equation

HRID 1247920 reaction equation
Cl.[NH2:2][CH:3]1[C:28](=[O:29])[N:5]2[C:6]([C:12]([O:14][CH:15]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)[C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)=[O:13])=[C:7]([CH2:10][Cl:11])[CH2:8][S:9][C@H:4]12.CN(C)C1C=CC=CC=1.Cl.[CH2:40]([O:42][N:43]=[C:44]([C:48]1[N:52]=[C:51]([NH2:53])[S:50][N:49]=1)[C:45](Cl)=[O:46])[CH3:41].Cl>C(Cl)Cl.O>[CH2:40]([O:42][N:43]=[C:44]([C:48]1[N:52]=[C:51]([NH2:53])[S:50][N:49]=1)[C:45]([NH:2][CH:3]1[C:28](=[O:29])[N:5]2[C:6]([C:12]([O:14][CH:15]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[C:22]3[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=3)=[O:13])=[C:7]([CH2:10][Cl:11])[CH2:8][S:9][C@H:4]12)=[O:46])[CH3:41]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 949N,N-DimethylanilineHCID 13239629Benzhydryl 7-amino-3-chloromethyl-3-cephem-4-carboxylate hydrochlorideHCID 867392542-Ethoxyimino-2-(5-amino-1,2,4-thiadiazol-3-yl)acetyl chloride hydrochloride

Product 1

HCID 131714229Benzhydryl 7-[2-(5-amino-1,2,4-thiadiazol-3-yl)-2-ethoxyiminoacetamido]-3-chloromethyl-3-cephem-4-carboxylateYield 88.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
5 °C

Procedure

To a suspension of diphenylmethyl 7-amino-3-chloromethyl-3-cephem-4-carboxylate hydrochloride (27 g) in methylene chloride (300 ml) was added N,N-dimethylaniline (36.2 g) under cooling in an ice bath at 5° C. To the solution was added portionwise 2-ethoxyimino-2-(5-amino-1,2,4-thiadiazol-3-yl)acetyl chloride hydrochloride (syn isomer) (16.2 g) below 11° C. and the mixture was stirred for 45 minutes at 5° C. The reaction mixture was diluted with a mixed solvent of methylene chloride (100 ml) and water (200 ml) and adjusted to pH 2 with 1N hydrochloric acid. The organic layer was separated out, washed with water, dried over magnesium sulfate and evaporated to dryness. The residue was triturated in diethyl ether to give diphenylmethyl 7-[2-ethoxyimino-2-(5-amino-1,2,4-thiadiazol-3-yl)acetamido]-3-chloromethyl-3-cephem-4-carboxylate (syn isomer) (32.4 g), mp 120° to 125° C. (dec.).

Workup

  1. customThe organic layer was separated out
  2. washwashed with water
  3. dry with materialdried over magnesium sulfate
  4. customevaporated to dryness
  5. customThe residue was triturated in diethyl ether

Sources & evidence

ORD record
ord-a11c7bfbbb7e41bb9ba9a637defe5c84
Source dataset
uspto-grants-1985_06
Patent number
US04521413

Reaction notes

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